'use strict'
const path = require('path')
const webpack = require('webpack')
const defaultSettings = require('./src/settings.js')

function resolve(dir) {
  return path.join(__dirname, dir)
}

// 标题
const name = defaultSettings.title || 'Tinywind Boot' // page title

// 端口号设置
const port = process.env.port || process.env.npm_config_port || 9527 // dev port

// vue.config.js 配置 官方文档 https://cli.vuejs.org/zh/config/#vue-config-js
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: '/',
  // npm run build 或 yarn build 时生成的目录名称(默认dist)
  outputDir: 'dist',
  // 项目打包后生成的静态资源(js, css, img, fonts等)的位置
  assetsDir: 'static',
  lintOnSave: false,
  // 如果不需要生产环境的 source map, 可以将其设置为 false 以加速生产环境构建
  productionSourceMap: false,
  // webpack-dev-server 配置 参考 https://webpack.js.org/configuration/dev-server/
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    }
  },
  // 该配置会通过webpack-merge合并到最终配置中
  configureWebpack: {
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  chainWebpack(config) {
    // 删除 link 标签上带有的预加载标签 内网不需要, 防止造成服务器压力
    config.plugins.delete('preload')
    config.plugins.delete('prefetch')
    // 开始配置打包相关设置
    // 1. 设置 svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config.when(process.env.NODE_ENV === "development", (config) => {
      config.devtool("cheap-module-eval-source-map");
    });
    config.when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
              // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  }
}
